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NUT AND BOLT;

Patented Sept. 18, 1888.

UNITED. STATES PATENT OFFICE.

ANTON scHiiTZ, EDUARD SOHULTES, AND RICHARD PLUcKER, or

SOLINGEN, GERMANY.

NUT AND BOLT.

SPECIFICATION forming part; of Letters Patent No. 389,603, datedSeptember 18, 1888.

I Application filed February 27, 1888. Serial No. 265,492. (No model.)

1'0 all whom it may concern.-

. Be it known that we, ANTON ScHii'rz, ED- UARD SOHULTEs, and RICHARDPLiioKER, all of Solingen, Germany, have invented a new and usefulImprovement in Nuts, of which the following is a specification.

This invention relates to a nut in which the screw-threads are replacedby balls received by sockets in the nut and projecting between thethreads of the screw.

The invention consists in the various features of improvement, morefully pointed out in the claim.

In the accompanying drawings, Figure 1 is a longitudinal central sectionof a nut provided with our improvement, showing it in engagement with ascrew. Fig. 2 is a cross-section on line at m, Fig. 1. Fig. 3is alongitudinal section of the nut without the screw. Fig. 4is alongitudinal central section, partly in side view, of a modification.

The letter A represents a nut provided at proper places with socketsthat receive outwardly-projecting balls at. The nut should be made witha smooth bore, excepting for these sockets, that are placed at pointsthat would be occupied by the thread of an ordinary nut.

The balls a may be made of glass, steel, or other suitable material.They enter between the threads of the screw B, and if the screw isrevolved the balls will turn in their sockets and constitute rollerstravelingalong the screw. Thus but little friction will take place. Anysuitable number of balls at can be employed.

In Fig. 4 we have shown the screw B provided with the sockets and withthe balls a, while the nut A has the screw-thread for engagement withsaid balls. Thus the arrangement is reversed and the screw, for thepurpose of this invention, constitutes an equivalent of the nut.

The invention may also be applied to endless screws. It is deemed to beparticularly useful for vises, punches, presses, and drills.

What we claim is- A nut provided with sockets, in combination with ballsa, received by said sockets and projecting out of the same, and withabolt or rod grooved correspondingly with the nut, substantially asspecified.

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

ANTON soHUrZ. EDUARD scHpL'rEs. RICHARD PLUGKER.

\Vitncsses:

GUSTAVE ALBERT Onnnrons, WM. D. WARNER.

